Re: [dispatch] SIP and GSM/UMTS with OpenBTS

[Ivo Sedlacek <[e-mail]>]

Hello Jim,

I am confused with your responses.

Previously you stated to my question:

> > E.g. can you please clarify whether you indent to specify a solution for:
> >a) carriers with license to use the licensed GSM bands?
>
> Yes.
>
> > b) individuals/corporates without license to use the licensed GSM bands?
>
> No.
>
> > c) anyone else?


If your intention is to provide a solution for individuals/corporates to be used in GSM bands where no license is needed, can you please answer the questions below:

Can you please provide a reference to regulators' document enabling usage of GSM bands without license in each of those countries where license is supposed to be not necessary? As far as I remember, you listed Sweden, UK with question mark, Netherlands with question mark, and Antarctica was also mentioned. I could have missed something.

How will interferences be avoided if several individuals/corporates start using the same GSM band in the same location, particularly if each starts using power enabling "potential 20 mile radius even for a single cell"?

Furthermore, even if all of Sweden, UK, Netherlands and Antarctica enable usage of GSM bands without license, this is still quite limited market. If the solution is limited only to those countries, even if the required feature set is smaller, there is little economies of scale.

Kind regards

Ivo Sedlacek

From: dispatch [mailto:[e-mail]] On Behalf Of Jim Forster
Sent: 13. února 2014 16:41
To: DRAGE, Keith (Keith)
Cc: [e-mail]
Subject: Re: [dispatch] SIP and GSM/UMTS with OpenBTS

Keith,

Responding only one part for a clarification; it's late here and I don't want make any more mistakes.


I see Jim has now identified that this proposal is for licensed GSM operators in licensed GSM space.

And license-free space; see below.


 Personally, I would suggest if you believe the operators should be picking this up, you take it to 3GPP where the operators are actually present. That is the only way you will see it taken up by GSMA, which you will need to obtain interoperator agreements to use this (e.g. roaming, shared networks). 3GPP them works with IETF on any SIP extensions needed.

I would only see IETF having any direct part in this if the proposal was only to use unlicensed spectrum by enterprises rather than licensed operators, which Jim has negated.

OK, probably incorrectly, i read 'unlicensed' as ignoring licensing policy.  So to clarify:

Licensed Spectrum  -- Yes

License free (ex-DECT Guard bands in Sweden, etc.)  -- Yes

Illegal -- No

  -- Jim